Power outage derails IndiaA road is packed in heavy traffics following power outage and rains in the central part of New Delhi, India, Tuesday, July 31, 2012. India's energy crisis spread over half the country Tuesday when both its eastern and northern electricity grids collapsed, leaving 600 million people without power in one of the world's biggest-ever blackouts. Traffic lights went out across New Delhi.

Power outage derails IndiaHeavy traffic moves along a busy road as it rains during a power-cut at the toll-gates at Gurgaon on the outskirts of New Delhi July 31, 2012. Grid failure hit India for a second day on Tuesday, cutting power to hundreds of millions of people in the populous northern and eastern states including the capital Delhi and major cities such as Kolkata.

Power outage derails IndiaCommuters wait for buses outside a Metro station after Delhi Metro rail services were disrupted following power outage in New Delhi, India, Tuesday, July 31, 2012. India's energy crisis cascaded over half the country Tuesday when three of its regional grids collapsed, leaving more than 600 million people without government-supplied electricity in one of the world's biggest-ever blackouts.

Power outage derails IndiaCommuters wait for buses outside a Metro station after Delhi Metro rail services were disrupted following power outage in New Delhi, India, Tuesday, July 31, 2012. A massive blackout hit northern and eastern India on Tuesday afternoon, leaving 600 million people without electricity in one of the world's most widespread power failures. The outage came just a day after India's northern power grid collapsed for several hours leaving cities and villages across eight states powerless.

Power outage derails IndiaCommuters wait in line at a Metro station after Delhi Metro rail services were disrupted following power outage in New Delhi, India, Tuesday, July 31, 2012. India's energy crisis cascaded over half the country Tuesday when three of its regional grids collapsed, leaving more than 600 million people without government-supplied electricity in one of the world's biggest-ever blackouts. The city's Metro rail system, which serves about 1.8 million people a day, immediately shut down for the second day in a row.

Power outage derails IndiaPassengers sit on a platform for their train to arrive as they wait for electricity to be restored at a railway station in New Delhi July 31, 2012. Grid failure hit India for a second day on Tuesday, cutting power to hundreds of millions of people in the populous northern and eastern states including the capital Delhi and major cities such as Kolkata.

Power outage derails IndiaPassengers rest on a platform for their train to arrive as they wait for electricity to be restored at a railway station in New Delhi July 31, 2012. Grid failure hit India for a second day on Tuesday, cutting power to hundreds of millions of people in the populous northern and eastern states including the capital Delhi and major cities such as Kolkata.

Power outage derails IndiaA passenger looks through the window of a train as he waits for electricity to be restored at a railway station in New Delhi July 31, 2012. Grid failure hit India for a second day on Tuesday, cutting power to hundreds of millions of people in the populous northern and eastern states including the capital Delhi and major cities such as Kolkata.

Power outage derails IndiaCommuters crowd a busy road outside a Metro station after Delhi Metro rail services were disrupted following power outage in New Delhi, India, Tuesday, July 31, 2012. Indian officials say the nation's northern and eastern power grids have failed, leaving about half the country without power. The collapse of the grids Tuesday afternoon came a day after the northern grid failed and left eight states without power for much of the day.

Power outage derails IndiaIndian stranded passengers wait on a platform and some of them on rail tracks for the train services to resume following a power outage at Sealdah station in Kolkata, India, Tuesday, July 31, 2012. India's energy crisis cascaded over half the country Tuesday when three of its regional grids collapsed, leaving 620 million people without government-supplied electricity for several hours in, by far, the world's biggest-ever blackout. Hundreds of trains stalled across the country and traffic lights went out, causing widespread traffic jams in New Delhi.

Power outage derails IndiaStranded passengers wait on a railway tracks for the train services to resume following a power outage at Sealdah station in Kolkata, India, Tuesday, July 31, 2012. India's energy crisis cascaded over half the country Tuesday when three of its regional grids collapsed, leaving 620 million people without government-supplied electricity for several hours in, by far, the world's biggest-ever blackout. Hundreds of trains stalled across the country and traffic lights went out, causing widespread traffic jams in New Delhi.

Power outage derails IndiaPassengers sit in a train as they wait for power to get restore, at a railway station, in New Delhi, India, Monday, July 30, 2012. A major power outage has struck northern India, plunging cities into darkness and stranding hundreds of thousands of commuters. Trains across eight northern Indian states and metro services in New Delhi were affected by the outage that struck at about 2:30 a.m. local time.

Power outage derails IndiaCommuters wait for a metro train, in New Delhi, India, Monday, July 30, 2012. Northern India's power grid crashed Monday, halting hundreds of trains, forcing hospitals and airports to use backup generators and leaving 370 million people - more than the population of the United States and Canada combined - sweltering in the summer heat.

Power outage derails IndiaStranded foreign passengers wait for their train at New Delhi railway station, in New Delhi, India, Monday, July 30, 2012. The electricity grid across northern India failed Monday, leaving hundreds of millions of people without electricity in one of the worst power failures of the past decade, officials said.

Power outage derails IndiaMuslim girls study in the light of candles inside a madrasa or religious school during power-cut in Noida on the outskirts of New Delhi July 30, 2012. Grid failure left more than 300 million people without power in New Delhi and much of northern India for hours on Monday in the worst blackout for more than a decade, highlighting chronic infrastructure woes holding back Asia's third-largest economy.

Power outage derails India

Heavy traffic moves along a busy road as it rains during a power-cut at the toll-gates at Gurgaon on the outskirts of New Delhi July 31, 2012. Grid failure hit India for a second day on Tuesday, cutting power to hundreds of millions of people in the populous northern and eastern states including the capital Delhi and major cities such as Kolkata.